Mikel Leshoure enters camp "seemingly entrenched" as the Lions' No. 4 tailback, behind Reggie Bush, Joique Bell, and Theo Riddick. Leshoure is a between-the-tackles grinder, whereas Bush, Bell, and Riddick can theoretically all function on all three downs. Leshoure, 24, could be floated as trade bait as the season draws closer. He's on the roster bubble.